91 research outputs found
One-nucleon Transfer Between Heavy-ions At Intermediate Energies
No full textOne-nucleon transfer processes between heavy ions at intermediate energies are studied in the framework of the eikonal distorted-wave Born approximation. Optical phase shifts describing core-core relative motion are microscopically described in the Glauber model, starting from experimental nuclear densities and nucleon-nucleon scattering amplitudes at the corresponding energies. The interaction responsible for the nucleon transfer is a complex energy-dependent potential obtained by the Abel transform of the nucleon-core phase shift. Applications to one-proton and one-neutron transfer reactions on Pb-208 induced by C-12 and O-16 projectiles are discussed for both angular distributions and normalization factors
α-Like Part of Four-Nucleon Wave Functions
No full textA procedure is developed for projecting out the relative angular momentum, spin- and isospin-zero α-like part of the wave function of four nucleons moving in a single-particle potential of arbitrary shape. Examples in the 20Ne nucleus and Ni-Zn regions are used to test and illustrate the procedure
118Sn levels studied by the 120Sn( p, t) reaction : high-resolution measurements, shell model, and distorted-wave Born approximation calculations
No full textCross-section angular distributions of 38 (p, t ) transitions to final states of 118Sn up to an excitation energy
of 3.597 MeV have been measured in a high-resolution experiment at an incident proton energy of 21 MeV. A
distorted-wave Born approximation (DWBA) analysis of the 38 experimental differential cross sections, carried
out by using conventionalWoods-Saxon potentials, allowed us either 18 confirmations of previous spin and parity
values or new assignments of spin and parity to 14 states of 118Sn. A shell-model calculation has been performed
by using a realistic two-body effective interaction derived from the CD-Bonn nucleon-nucleon potential. The
doubly-magic nucleus 132Sn is assumed as a closed core, with 14 valence neutron holes occupying the five levels
of the 50–82 shell. Within this model space the calculations are performed by employing the seniority scheme
including states with seniority up to 4. The energy spectrum of 118Sn has been calculated and compared with
the experimental one. The theoretical two-neutron spectroscopic amplitudes are used in the microscopic DWBA
calculations of some cross-section angular distributions
An assessment of natural product discovery from marine (sensu strictu) and marine-derived fungi
No full textSpectroscopy of Sn-110 via the high-resolution Sn-112(p, t)Sn-110 reaction
No full textThe Sn-112(p,t)Sn-110 reaction was studied in a high-resolution experiment at an incident proton energy of 26 MeV. Angular distributions for 27 transitions to levels of Sn-110 up to an excitation energy of similar to 4.3 MeV were measured. A distorted-wave Born approximation (DWBA) analysis of experimental angular distributions using conventional Woods-Saxon potentials were done, allowing either the confirmation of previous spin and parity values or the assignment of new spin and parity to a large number of Sn-110 states. A shell-model study was performed using an effective interaction derived from the CD-Bonn nucleon-nucleon potential. The energy spectra are calculated and compared with experiment, whereas the theoretical two-nucleon spectroscopic amplitudes, evaluated in a truncated seniority space, are used in the microscopic DWBA calculation of some cross-section angular distributions
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